Backbone network

Fibre network footprint










Reintel´s backbone network comprises the surplus optical fibre network of Red Eléctrica electricity transmission grid and the optical fibre not dedicated to the railway service of ADIF’s conventional long-distance network.

Our backbone network connects the main cities nationwide. Optical fibre segregations from the backbone network are performed at our sites. In those cases when the fibre stems from the railway network, our customers will be able to use the telecommunications co-location centres; when stemming from the electricity network, telecommunications shelters are available.

Our customers lighten up the integrated dark fibre network, thus forming the arteries of their own telecommunications networks.




Our backbone network enables our customers to interconnect with other customers as well as with other national or international external networks. Reintel has international interconnection links with France, Portugal, Morocco and Andorra.


Line layouts

We have aerial, ducted and submarine cable lines that integrate and make up the backbone network we offer to our customers.



We market our backbone network by fibre pair cables between telecommunications co-location centres or telecommunications shelters, either by a transfer of right to use or by a multi-year period lease.


Security and reliability

Our backbone network is ready to undergo the critical systems that have a direct impact on our customers’ processes and products since it supplies security and reliability, which are essential for providing both electricity and railway services.



The integration of the electricity and the railway networks creates a meshed network with redundancies that provides our customers with highly resilient communications networks.



We offer nationwide coverage (peninsular Spain and islands), thanks to the integration of the electricity and the railway networks. By doing so our customers achieve the highest efficiency in the design and deployment of their telecommunications networks.

More than 52,000 kms of network in Spanish territory


Red Eléctrica Infraestructuras de Telecomunicación (Reintel) is the subsidiary of the Redeia that, as of 1 July 2015, has been responsible for the management of the Company’s telecommunication business, an activity that previously, from 2008, had been carried out by Red Eléctrica Internacional. Reintel focuses on the commercial exploitation of dark fibre infrastructure and technical facilities connected to such infrastructure relying on an optical fibre network of more than 52,000 km. Therefore, we have the full support of a solid and solvent business group with a vast experience in the telco market since 1997.

At Reintel we manage two networks, each one with its own history and unique technical features: the unused, surplus fibre network of Red Eléctrica and, since November 20, 2014, the surplus marketable fibre network of ADIF.

These are two networks that are deployed through different infrastructures, each with different requirements and constraints, but which are being interconnected by Reintel at many points in order to offer services to our customers as if we were dealing with a single network by using the best of both. At Reintel we are working to provide our customers with a single network framework in which other networks integrate and interconnect every day.

At Reintel we are aware of how important for our customers is to have detailed information about our infrastructure and, therefore, in the Infrastructure section on this web we present both the technical features of the sites and the details of the network map displayed by province.

We invite you to discover, in the Infrastructure section on the web, detailed information about our dark fibre network (currently more than 52,000 km) and the 1,344 sites (810 on the electricity grid and 534 on the railway network) that we make available to you.

Yes. Reintel, in addition to offering its optical dark fibre network, also offers two types of sites (on the electricity grid and on the railway network) to provide customised solutions based on the technical requirements, location and type of optical fibre that interconnects them. Contact us and we will analyse your specific needs in order to offer you the best solution.